Well, first off, for a little party (5 - 20 guests) one entertainer is certainly enough, but for a larger party you might like to consider two. I can handle a bigger group, but it's usually more fun for everyone with two gals no matter what size the party is.
A party generally goes something like this (with room for improvisation and personality tweaking):

An introduction dance just for the groom-to-be, during which I will strip to nude, and if he's playful, I'll strip him down to his underclothes. Other teasing and playful antics might happen now, too, including an example of what sort of fondling is acceptable during lapdances (I allow quite a bit, but there ARE limits). This bit takes about 10 - 15 minutes.

After dancing for the groom-to-be I will offer lapdances for everyone else, in a small party everyone will probably get one then, at a larger party some people will get left out - but I get back to them later. This usually lasts another 15 to 25 minutes.

I will take a short break (get a sip of water, freshen my make-up, etc) and my assistant will set up an area for me with some odds and ends I bring with me. (candles, dildos, anal beads, vibrators, clothes pins, baby oil... all sorts of odds and ends...) Hopefully the GTB let me take off his shirt during the first dance because I bring a t-shirt with me for him to wear during this portion of the entertainment (he gets to keep the shirt!). I'll invite him to join me and "help" me out with body paints, baby oil, vibrators, and all those odds and ends. Of course he's welcome to say no, in which event I usually ask him to nominate someone else to take his place. This takes about 30 minutes.
If your party is a multiple girl party this part would be a girl/girl show that includes all of the above, and then some, but with less participation from the man of honor.

I will take another short break. (To clean up, because I'm a mess after that! The breaks also give everyone a chance to get up, go to the bathroom, get new drinks for themselves, and joke around - they don't tend to interupt the flow of the party.) When I come back this time I'll offer lapdances again, as well as whipped cream "games", it's not much of a game - ya just get to lick whipped cream off of me! I used to also offer body shots, but I had so many bad experiences with that I quit :( I will continue with this for another 30 - 45 minutes or until everyone is pretty much done.

Tipping is optional, I ask a somewhat higher rate than most of the party agencies in town for just this reason. If you talk to them you will get a party outline very similar to this, but this is how it goes; (I know because I have worked for both of the agencies in the area.) They will encourage you to put dollar bills all over the bachelor during his special dance, they will only dance for him as long as there is money on him, otherwise it will be about half a song and they will move on, they may not even get nude. They will state that lapdances are for a set tip - anywhere from 5 to 20$ a dance, and if you don't tip, they will not dance. If they offer a toy show of any sort, it will be an additional 100$ per girl to even get the show. They will expect more tipping during the show, or they will cut the show short, or request specific tips to do certain things. If it is a girl/girl show, they will fake it during the oral and kissing, or only one girl will receive, or sometimes they will both do a solo act at the same time with no interaction at all(it sort of depends on the girls working together). Same thing for whipped cream or body shots, a specified tip, or no shot - generally 5 - 10$. As soon as the tipping stops, they leave, no matter what amount of time they contracted to stay. I'm not telling you this in order to get you to hire me and not them, I just want you to understand why I charge a higher rate. It only looks higher, it's actually a much better deal! For example: Candi Kiss charges $180 for a 90 minute 1 girl party. This doesn't include anything but the girl showing up. Apply the information I just gave you, Bachelor dance +$20, Toy Show +$100 +$30 Tipping, Lapdances +$10 per guest, Whipped Cream +$5 per guest - for a 5 guest party this is going to run you $405 and you will have spent the evening being badgered for money. For me it's $300, for everything, and that doesn't change no matter how many guests are at your party. If you and your guests want to tip me because ya just love the daylights out of me, GREAT! If not, SO WHAT! I'm still going to give you the best party I can.

I hope this gives you a decent idea what to expect, if you have any other suggestions or questions, please drop me a line and I'll see what we can do about them.